Going 4/10ths, because 1) they're public roads, 2) I'm unfamiliar with the car, 3) I'm a wimp, and I know I wasn't going all that fast because the traction control light only turned on maybe a dozen or so times in my hour and a half of driving.
Steering is very light. Of course, it has power steering, but I have no comparison to a hydraulic steering 911 with power steering. It no longer feels like the engine is out back.
In a slalom, tires break much faster, but that may just be the Nitto tires with 580 rating. Or it could be that the car is longer and has to turn more. I don't know.
Next up is to try it at an autocross course.
https://goo.gl/maps/QNv2aUWfn1dCztJS7